Read the beginning of the old thread, we tried to figure out the best week night to have the ride, so for the moment Tuesday at 7:30 or 8 is the best. As far as having rides Friday or Saturday, that is getting into the weekend (so not really a weekday ride) and you could ride during the day on natural rocks and such.
The whole point of this ride was to have a time mid week when people could ride after work or school. We ride at the Embarcadero because it is the only place that is well lit at night (most of us would usually rather be riding more natural terrain).
So, in my opinion, feel free to organize as many weekend rides as possible, but leave the midweek ride where it is for now.
Ray has to work Tuesday nights? Did his schedule change in the last two days?